Paper guiding attachment for typewriters and similar machines



' Nbv, 10, 1942.

F. EIBERT 2,301,386 PAPER GUIDING ATTACHMENT FOB TYPEW'QITERS ANDSIMILAR MACHINES I Filed Dec, 2, 1937 inveni'or: Frilg Ei 5011' by his"afiorney Patented Nov. 10, 1942 a r PAPER, GUIDING ATTACHMENT FOR TYPE.-

WRITERS AND SIMILAR MACHINES Fritz Eibert, Dresden, Germany; vested'inthe Alien Property Custodian Application December 2, 1937, Serial No.177,683 In Germany December't, 1936 8 Claims.

The invention presented here concerns an innovation n typewritersspecifically a new attachment for the inserting'of the paper into themachine.

In machines so far known the paper is inserted between the paper guidingtable and the platen and by turning the platen is advanced between thelatter and the pressure rolls. By the friction which is exerted by thepressure of the feed rolls upon the paper it is further advanced byturning of the platen until it appears again in front of the roller. Inall these constructions the operator must reckon with the fact that hewill have to straighten and arrange the paper before inserting it intothe machine as after feeding it around the platen. The'pressure feedrolls do not catch hold evenly of the paper and allow it to becomecrooked especially when several layers of writing-copy and carbon paperare inserted. Therefore with the known arrangements it is impossible toinsert a more or less thick layer of paper, consisting of several sheetsof writing and carbon paper in such a way that these papers appear againexactly edge upon edge at the front of the platen; furthermore thereexists the imperfection or bad feature that during the advancing of thepaper between the pressure feed rolls and platen the carbon paper or thethin copypaper is wrinkled or misplaced, a fact which gives the carboncopies a soiled appearance.

The attachment according to the invention presented here corrects theseexisting faults. By it the paper properly arranged is inserted into themachine and is not disarranged during the advancing between the rollers,furthermore it is brought at once under the paper holding bar.

It is therefore no'longer necessary that the latter be first lifted bythe operator and the paper is drawn under it. Due to the arrangementaccording to my invention the writing upon the extreme upper edges iseffected without the least difficulty and the papers appear evenlyarranged edge upon edge at the front of the platen.

In the accompanying drawing one embodiment of the new attachmentaccording to the invention is represented.

Figure 1 is a fragmentary view in perspective on an enlarged scaleillustrating the invention;

and v Figure 2 is an end elevation.

The typewriter in which this invention is embodied may be standard inall-respects with the exception of the paper feeding devices hereinwhichthe invention is concerned are shown in the drawing.

As shown, the typewriter is provided with the stationary paper guidingtable 85, at the lower edge of which is hinged a swingable paper guide81, which may be attached to guide 85 by ashaft 86a. Swingable paperguide 81 is provided at its lower edge with spaced extensions 88terminating in hook-like ends, which are normally maintained lightlyagainst the platen 2| by means of small springs 86!).

At each end of platen 2 I is a circular extension 2Ia around which isrotatably positioned a ring 9|. These two rings 9| are connected by abar 82. Pivotally mounted on bar 92, as at 93, and partially surroundingthe platen is a paper clamping plate 94, the free edge of which isprovided with spaced projections 95, between which the hooked ends 88 ofswingable paper guide 81 pass. At each end of this edge of clampingplate 94 is attached a spring 96, which substantially continues thecurvature of plate 94.

Upon each ring 9| is mounted a catch 91, which is swingable laterallyupon a pivot 98, and is normally maintained in the position shown inFigure 1 by means of a spring 99 and lug I99, which engages with stop9Ia on ring 9i.

Adjacent each end of the platen and affixed to a shaft IUI, which isrotatably mounted in suitable bearings (not shown) in the frame of themachine is an operating lever I03. Each of these operating levers isprovided with a cam-like device IM, which, whenthe lever is swungforward, will engage leaf spring 96 and wrap it around ring 9| until itsend engages latch 91, pushes the latch aside and snaps under it,whereupon it is securely held by the latch. This also moves paperclamping plate 94 and particularly its toothed edge 95 into closeengagement with platen 2|.

On lever I03 is pivotally mounted as at I06 a second lever I95,'which isnormally held with respect to lever I93 in the position shown in Figure1 by means of spring I I9 and stop I09. When in this position the rearend IE8 of lever I05 will just contact with swingable paper guide 81.Also, on lever I95 is a projection or portion after described.Therefore, only those parts with I91 which also serves as a stop for apurpose hereinafter to be explained.

On the frame of the machine are fastened catch-release prongs III, Whichat the proper time, as will be explained, open catches 91. One of therings 9I is also provided with a stop H2 to arrest the motion of therings and clamping plate 94 at the proper time.

The device operates as follows:

Assume that several sheets of paper are to be inserted simultaneouslyinto the machine. With the device in its normal position, i. e., withthe hook-like ends 88 of guide plate 81 resting against the platen andclamping plate 94 swung away from the platen, the operator places thepaper in the usual manner against stationary guide 85 and lets it droponto the hooks 88 of guide plate 81. After the paper is properlyarranged, the operator pulls lever I83 forward with the result thatcam-like elements I04 engage leaf springs 98 and wrap them around rings91 until their ends engage latches 91, push them aside and snap underthem, as shown in Figure 2. This also causes clamping plate 94 to moveforward so that the paper is clamped, held tightly be-' tween its edge95 and the platen. If the platen is now turned, clamping plate 94 willturn with it, and the sheets of paper will be carried along withoutdisturbing their alinement. The operator may then move lever I03 back toits normal position.

After the platen has been turned so that clamping plate 94 appears atthe front of the platen, as shown in Figure 2, lug we on latch 91 willengage arm III, by which the catch will be swung aside and the end ofleaf springs 96 released. Thereupon clamping plate 94 also swings awayfrom the platen and the paper is thereafter held and moved by the usualdevices, provided for the purpose. Since there may still be somefrictional engagement between clamping plate 94 and the paper, furtherrotary movement of clamping plate 94 is prevented by means of stop I I2on top of the rings 9|, which stop is so positioned that it will engagewith face or stop 01 on lever I05, simultaneously with the releasing ofthe leaf springs 96.

After the sheets have been removed from the machine the operator pusheslever I05 towards the rear which will permit stop H2 to free itself fromstop I01, so that bar 92 and clamping plate 94 can slide back to theiroriginal positions below the platen. Continued motion of lever H35 willalso swing lever I93 towards the rear so that end I08 of lever I05,which heretofore has been merely in contact with swinging paper guide81, pushes this guide away from the platen to provide room for bar 92 toslide between its hooklike ends 88 and the plate. Then lever [55 isreleased and both levers return to their original position, whereuponthe device is in condition to receive the next lot of paper.

I claim:

1. In a typewriter, the combination of a platen, a stationarypaper-guidingdevice, a second paper-guiding device movably mounted onthe stationary paper-guiding device having hook-like projections on anedge adjacent the platen adapted to support in accurate edge alinementsheets of paper, a clamping plate so mounted as to be movable towardsand away from said platen, a carriage frame, a service lever pivotallymounted thereon and provided with'means for moving the clamping platetowards said platen when said service lever is swung in one direction,and with means for moving the movable paper-guiding device away from theplaten when said service lever is swung in the opposite direction.

2. In a typewriter, the combination of a platen, a stationarypaper-guiding device, a second-paper-guiding device movably mounted onthe stationary paper-guiding device having hook-like projections at anedge adjacent the platen adapted to support in accurate edge alinementsheets of paper, a ring slidably mounted upon each end of the platen, aclamping plate attached to said rings for holding the papers against theplaten, a carriage frame, a service lever pivotally mounted thereon andprovided with means for moving the clamping plate towards said platenwhen said service lever is swung in one direction to clamp against saidplaten said sheets of papare previously alined upon said movablepaperguiding device, means for maintaining said clamping plate inclamping position independently of said service lever, a second servicelever pivotally mounted upon said first service lever and movabletherewith in both directions, means for holding said movablepaper-guiding device against said platen when said service levers areswung in said first-mentioned direction, and means on said secondservice lever for swinging said movable paper-guiding device away fromsaid platen when said service levers are swung in the oppositedirection.

3. In a typewriter, the combination of a platen, a stationarypaper-guiding device, a second paper-guiding device movably mounted onthe stationary paper-guiding device having hook-like projections at anedge adjacent the platen adapted to support in accurate edge alinementsheets of paper, a ring slidably mounted upon each end of the platen, aclamping plate attached to said rings for holding the papers against theplaten, a carriage frame, a service lever pivotally mounted thereon andprovided with means for moving the clamping plate towards said platenwhen said service lever is swung in one direction to clamp against saidplaten said sheets of paper previously alined upon said movablepaper-guiding device, means for maintaining said clamping plate inclamping position independently of said service lever, a second servicelever pivotally mounted upon said first service lever and movabletherewith in both directions, means for holding said movablepaper-guiding device against said platen when said service levers areswung in said firstmentioned direction, and means on said second servicelever for swinging said movable paperguiding device away from saidplaten whensaid service levers are swung in the opposite direction, andmeans for holding said clamping plate in clamping position independentlyof said first service lever, and means for automatically releasing saidclamping plate from paper-clamping position when said sheets of paperhave been fed around the platen.

4. In a typewriter, the combination of a platen,

a stationary paper-guiding device, a second paper-guiding device movablymounted on the stationary paper-guiding device having hook-likeprojections at an edge adjacent the platen adapted to support inaccurate edge alinement sheets of paper, a ring slidably mounted uponeach'end of the platen, a'clamping plate attached to said rings forholding the papers against the platen, a carriage frame, a service leverpivotally mounted thereon and provided with means for moving theclamping plate towards said platen. when said service .lever is swung inone direction to clamp against said platen said sheets'of paperpreviously alined upon said movable paper-guiding device, means formaintaining said clamping plate in clamping position independently ofsaid service lever, a second service lever pivotally mounted upon saidfirst service lever and movable therewith in both directions, means forholding said movable'paper-guiding device against said platen when saidservice levers are swung in said first-mentioned direction, means onsaid second service lever for swinging said movable paperguiding deviceaway from said platen when said service levers are swung in the oppositedirection, means for holding said clamping plate in clamping positionindependently of said first service lever, means for automaticallyreleasing said clamping plate from paper-clamping position when saidsheets of paper have been fed around the platen, and means for releasingsaid movable paper-guiding device to permit it to resume its originalposition adjacent the platen operated by swinging the second servicelever in said opposite direction with the first service lever in itsoriginal position.

5. In a typewriter, the combination of a platen, a paper-guiding device,the lower end of which is ofiset to form a hook-like ledge adjacent saidplaten upon which the entering edges of inserted papers may rest inaccurate registry, a clamping plate for clamping said inserted papersagainst said platen, means for causing said clamping plate to clamp saidpapers against said platen without otherwise moving them and for thenmoving said guiding device away from said platen, means for rotatingsaid platen and said clamping plate when in paper-clamping position andmeans for automatically releasing said clamping plate after a partialrotation of said platen.

6. In a typewriter, the combination of a platen,

a stationary paper guide, a second paper guide which is movable withrespect to said first-mentioned paper guide and is provided at its loweredge with hook-like means for supporting sheets of paper with theiredges in alinement, a clamping plate for holding the sheets of paperagainst the platen, a supporting arm connected to each end of saidclamping plate provided with a forklike portion through which the shaftof said platen projects, and which is slidable transversely of saidshaft, a shifting lever and cam latch for drawing said clamping platetowards said platen into paper-clamping position and for retaining it inthis position, a service lever for operating said shifting lever and camlatch and. also for moving said movable paper guide out ofpaper-supporting position so that the papers can rotate with said platenwithout interference from said movable paper guide.

7. In a typewriter, the combination of a platen, a paper guiding device,the lower end of which is offset to form a hook like ledge adjacent saidplaten upon which the entering edges of inserted papers may rest inaccurate registry, a clamping plate for clamping said inserted papersagainst said platen, means for causing said clamping plate to clamp saidpapers against said platen without otherwise moving them, and for thenmoving said guiding device away from said platen, and means'for rotatingsaid platen and said clamping plate in unison when said clamping plateis in clamping position.

8. In a typewriter, the combination of a platen, a paper guiding device,the lower end of which is offset to form a hook like ledge adjacent saidplaten on which the entering edges of inserted papers may rest inaccurate registry, a clamping plate adapted to clamp said insertedpapers against said platen, mountings for said clamping plate, eachprovided with an elongated slot adapted to receive the shaft of theplaten, means for moving the clamping plate and its mountingstransversely of the shaft of the platen and for moving said paperguiding device towards and away from said platen, and additional meansadapted to turn the platen, clamping plate and its mountings in unison.-

